Reproduction, development

a large amount of sperm cells are produced by males everyday. the large number of sperm cells increse the chance that

• several sperm cells will join with the egg to fertilize it

• some of the sperm cells will survive to reach the egg

• at least one sperm cell will be released when the eggs swim toward the sperm cells in the ovary

• to transport the egg to an embryo

What is the relationship between the blood of a human fetus and the mother

• blood systems are seperate, but materials pass from one to another

• seperate, no materials exchaged

• flood flows directly from mother to fetus

• seperate only at some times and connected at other

Which sequence represents an order of some events in human development

• sperm-zygote-organs-tissues

• zygote-tissues-organs-fetus

• zygote-sperm-tissues-egg

• egg-zygote-fetus-gamete

Which statement concerning production of offspring is true

• reproduction requires gametes in all species

• asexual reproduction is needed for all other life sources

• an organism can reproduce without performing any other life processes

• production of offspring is necessary for a species to survive, but not an individual

a disease that infects the embryo in the early stages of pregnancy because it can

• infect the eggs

• transport to the embryo through red blood cells

• pass across the placenta

• absorb from the mothers milk to the embryo

The process of what formed the egg and sperm?

• mitosis

• meiosis

• interphases

• cleavage

How does the placenta function in relation to the fetus?

• It provides oxygen and nutrients to the fetus, while removing waste products.

• It serves as a physical barrier that prevents the fetus from exiting prematurely.

• It generates hormones necessary for the fetus's development.

• It has no direct role in fetal development but protects the mother from diseases.

What is the primary role of the umbilical cord?

• To deliver nutrients from the mother to the fetus.

• To connect the fetus to the placenta.

• To facilitate the development of the fetus's digestive system.

• To provide genetic material from the mother to the fetus.

Which of the following best describes the process of fertilization in humans?

• A single sperm cell combines with an egg cell to form a zygote.

• Multiple sperm cells fuse with an egg cell to ensure genetic diversity.

• The egg cell divides inside the ovary before being fertilized by a sperm cell.

• Fertilization occurs outside the body before the zygote is implanted in the uterus.

What role do hormones play in the development of secondary sexual characteristics during puberty?

• They are responsible for the rapid growth of bones and muscles.

• They trigger the development of characteristics such as body hair and voice changes.

• They decrease the rate of physical growth.

• They have no significant role in the development of secondary sexual characteristics.